diff --git a/packages/genui/a2ui-playground/src/components/PreviewPanel.tsx b/packages/genui/a2ui-playground/src/components/PreviewPanel.tsx
index 36db5f5858..a94ddeaa6d 100644
--- a/packages/genui/a2ui-playground/src/components/PreviewPanel.tsx
+++ b/packages/genui/a2ui-playground/src/components/PreviewPanel.tsx
@@ -664,7 +664,7 @@ export function PreviewPanel(props: PreviewPanelProps) {
                             ? (
                               <QrCode
                                 value={item.url}
-                                size={80}
+                                size={128}
                                 onErrorChange={setError}
                               />
                             )
diff --git a/packages/genui/a2ui-playground/src/styles.css b/packages/genui/a2ui-playground/src/styles.css
index 712d7f053e..4d4686c49d 100644
--- a/packages/genui/a2ui-playground/src/styles.css
+++ b/packages/genui/a2ui-playground/src/styles.css
@@ -956,8 +956,6 @@ html[data-theme="dark"] .phoneHomeIndicator {
   display: flex;
   flex-direction: column;
   gap: 8px;
-  max-height: 132px;
-  overflow-y: auto;
 }
 
 .previewQrContent {
@@ -1086,10 +1084,6 @@ html[data-theme="dark"] .phoneHomeIndicator {
   .previewPanelBody {
     min-height: 460px;
   }
-
-  .previewQrSection {
-    max-height: 120px;
-  }
 }
 
 @media (max-width: 720px) {